fix: 参考文献格式（#19）

[zzeitt]

测试环境

1. texlive 版本

latex -v

pdfTeX 3.141592653-2.6-1.40.24 (TeX Live 2022)
kpathsea version 6.3.4
Copyright 2022 Han The Thanh (pdfTeX) et al.
There is NO warranty.  Redistribution of this software is
covered by the terms of both the pdfTeX copyright and
the Lesser GNU General Public License.
For more information about these matters, see the file
named COPYING and the pdfTeX source.
Primary author of pdfTeX: Han The Thanh (pdfTeX) et al.
Compiled with libpng 1.6.37; using libpng 1.6.37
Compiled with zlib 1.2.11; using zlib 1.2.11
Compiled with xpdf version 4.03

2. 编译方式

xelatex main
biber main
xelatex main
xelatex main

改进效果

修正之前：

采用当前最新的gb7714-2015.bbx和gb7714-2015.cbx文件后：

修正参考文献标题后：